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Q.

Which of the following gases effuses the fastest under identical conditions?

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a

N2

b

CH4

c

O2

d

Cl2

answer is D.

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Detailed Solution

According to the Graham's law, the rate of diffusion/effusion of gases is inversely proportional to the square roots of their densities(or) Molecular masses. 

By applying the law on the given gases, we observe that CH4 diffuses out first.

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